Across
- 7. any factor that controls the growth of a population
- 9. each step in a food chain or food web
- 10. patterns and averages of temperature, precipitation, clouds, and wind over many years
- 11. a series of organisms in which energy is transferred from one organism to another
- 14. any nutrient whose supply limits productivity
- 17. any nonliving part of the environment
- 19. all the organisms that live in a place, together with their physical environment
- 21. the number of individuals thaat can be found per unit area
- 22. organisms that must acquire energy from other organisms
Down
- 1. the maximum number of individuals of a particular species that a particular environment can support
- 2. any living part of the environment with which an organism might interact
- 3. a wetland formed where a river meets the sea
- 4. a group of individuals that belong to the same species and live in the same area
- 5. short-term changes in temperature, precipitation, clouds, and wind from day to day, or minute to minute
- 6. a group of ecosystems that share similar climates and typical organisms
- 8. the total amount of living tissue within a given trophic level
- 12. an organism that can can capture energy from nonliving sources and convert it into forms living cells can use
- 13. a layer of permanently frozen subsoil
- 15. elements that an organism needs to sustain life
- 16. an assemblage of different populations that live together in a defined area
- 18. a material formed from decaying leaves and other organic material
- 20. a group of similar organisms that can breed and produce fertile offspring